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The general trend is that the first ionisation energies increases across the period from Na to Ar. But the first ionisation energy of sulphur is lower than phosphorus because the electronic configuration ...

Oxygen has four groups of electrons surrounding it: two sets of lone pairs, and two pairs of electrons that it shares with hydrogens (in these pairs, one electron comes from each of the oxygen and the hyd...

Intro:This is an electrophilic substitution reaction (nitration)Nitric acid and sulphuric acid are used to create the electrophile (NO₂⁺)The electrophile then substitutes itse...

Periodicity is the trend in chemical and physical properties of the elements across each period of the periodic table.All elements in a period have the same number of shells, all elements in a group have ...

GAS So / J K^-1 mol^-1 NH3(g) 193 O2(g) 205 NO(g) 211 H2O(g) 189
To calculate the entropy change, use Delta S = sum of products - sum of reacta...